Potential Annex I submarine structures made by leaking
gases

The map shows the location of known Annex I submarine structures made by leaking
gases. It also shows areas where gas seeps are known to occur
and therefore where there may be additional submarine stuctures
that have not yet been found. For information on the identification
of SACs for submarine structures made by leaking gases within 12
nautical miles of the coast, please contact the relevant country conservation agency.

There are currently only five known locations of submarine
structures made by leaking gases in the UK, as highlighted on the
map. The map also displays ‘fluid seep’ areas where gases are known
to seep up from below the seabed. Methane gas seepage from
the seafloor mixing with seawater can react under certain
conditions to form carbonate rock (MDAC), therefore the range of
this known fluid seepage can be used as an indicator for where
there may be other, as yet undiscovered, occurrences of submarine
structures made by leaking gases in the UK.

For information on how this dataset
was constructed, please read this document
(PDF 541 KB)

Offshore Annex I Submarine
Structures made by Leaking Gases Shapefiles

If you would like information on the
potential Annex I submarine structures made by leaking gases
shapefiles please contact our offshore survey team. Please
click on the map above to go to our Marine Protected Area
Interactive Map.